What are exterior cripple walls
Cripple walls are wooden stud walls on top of the exterior foundation.
They support the weight of the house and create a crawl space.
Bracing the cripple walls by using structual-grade plywood is simple and provides greater resistance to earthquakes..
Are cripple studs structural
Cripple studs are non-structural but provide a nailing base for siding or interior wall coverings. Spaced 16 or 24 inches on center, they carry the regular wall stud layout across the framed opening. Both cripple studs and cripple rafters are made from the same stock as other studs and rafters—they’re just cut shorter.
What is a jack stud in framing
A jack stud is a stud that has been cut down to be placed above and/or below an opening. The jack stud provides support to the lintel trimmer and sill trimmer.
Is a king stud necessary
This tool helps you do just that. The king stud on either side of the frame bulks up the support around an opening, compensating for the fact that studs have been omitted to make room for the opening. When a new home is built, king studs are usually required around doors and windows.
Do all houses have cripple walls
Almost all Bay Area houses built before 1940 (and many built more recently) have cripple walls. Cripple walls are the short wood stud walls that enclose a crawl space under the first floor. Non-retrofitted or “unbraced” cripple walls are known to be vulnerable to damage and even collapse in earthquakes. 3.
Are cripple studs load bearing
Cripple Studs – short studs installed above a header or below a window sill or saddle. In addition to their load bearing function, cripple studs maintain the uniform spacing of the wall studs upon which the interior and exterior wall coverings are attached. …
What is the purpose of cripple studs
Cripple walls are the short wood stud walls that enclose a crawl space under the first floor. Cripple walls are used to support a dwelling between the concrete foundation and the floor of a dwelling and to elevate the dwelling above ground to allow access to the utility lines or to level a dwelling built on a slope.
What is a cripple
(Entry 1 of 3) 1a sometimes offensive : a lame or partly disabled person or animal. b : one that is disabled or deficient in a specified manner a social cripple. 2 : something flawed or imperfect.
What is unreinforced brick
An unreinforced masonry building (or UMB, URM building) is a type of building where load bearing walls, non-load bearing walls or other structures, such as chimneys, are made of brick, cinderblock, tiles, adobe or other masonry material that is not braced by reinforcing material, such as rebar in a concrete or …
Is earthquake retrofitting effective
Properly retrofitted houses are made stronger against earthquake shaking and damage. This means your house is safer, and you’ve reduced the chance of injury or even death in a devastating earthquake.
How do you brace a cripple wall
Cripple walls are braced by nailing plywood sheathing to the inside of the walls that surround the crawlspace. A licensed contractor can complete a retrofit for houses with cripple walls shorter than four feet, or a skilled homeowner can do it, following a standard plan set.
Do you need cripple studs
There is no code requirement that I am aware of to use cripple studs if they are not needed. I put in two headers in my house, both are steel beams, neither has any cripple studs as the headers are tight against the existing wood double top plate.
How do you reinforce a house for an earthquake
Stiffening or bracing of the cripple wall to keep if from collapsing during seismic movement is a very important part of earthquake retrofitting. The bracing is accomplished by attaching structural grade plywood tightly to the wall framing.
How big of a hole Can I drill in a 2×4
Drilling. Any stud shall be permitted to be bored or drilled, provided that the diameter of the resulting hole is not more than 60 percent of the stud width, the edge of the hole is not more than 5/8 inch (16 mm) to the edge of the stud, and the hole is not located in the same section as a cut or notch.
Do cripple studs go above header
depending on wall height you likely need both. Cripple studs are the shorter studs that go above a header to make the rest of the space from the top of the header to the top of the wall. Cripple studs alone wouldn’t transfer the weight out to the jack stud.
How do I know if I have cripple walls
Go under the house through the crawl space, to see if there are any cripple walls. If there are cripple walls, check to see if they are braced. If you have neither of these, the cripple walls are probably insufficiently braced or unbraced. Horizontal or vertical wood siding is not strong enough to brace cripple walls.
How much weight can a cripple stud hold
When hanging items on a stud, a screw in the stud can support between 80 and 100 lbs. An entire stud wall could support 20,000-30,000 lbs depending on its length. The main thing is that you want to distribute the weight across as many studs as you possible.
What is a double top plate
A second top plate, also known as a “double plate” or “very top plate” is applied in the field to lock together intersecting walls.
How much does brace and bolt cost
A brace-and-bolt retrofit typically costs between $3,000 and $7,000 and helps to prevent the house from toppling off its foundation during strong shaking. The CEA offers premium discounts of up to 20 percent on earthquake insurance policies for houses with qualifying retrofits. Eligible homeowners have until Nov.
What is a header in wall construction
Headers take the weight of the materials and occupants above and transfer it via the trimmers down to the floors and foundations below. Longer openings require larger headers. Bearing walls (those that carry the weight of joists and trusses) require larger headers than nonbearing walls.
What is a sill in construction
A sill plate or sole plate in construction and architecture is the bottom horizontal member of a wall or building to which vertical members are attached. The word plate is typically omitted in America and carpenters speak simply of the “sill”. Other names are ground plate, ground sill, groundsel, and midnight sill.